Sheet treating apparatus



July 16, 1940.

//7 ven top.

032 0 K/lV/VE.

Patented July 16, 1940 PATENT OFFICE SHEET TREATING APPARATUS Otto Kinne, Halle-on-the-Saale, Germany Application oemieia,

1938, Serial N0. 234,070

In Germany September 16, 1937 GClaims.

The invention relates to a continuous feed immersion trough for endless cardboard webs which are to be steeped or impregnated to produes for example asphalt sheeting. These continuous feed immersion troughs have been made in two types. In the one type the cardboard web in the case of horizontal feed is pulled through the trough by two groups of rollers arranged at the two ends of the trough. The troughs present I the advantage over troughs with vertical feed by means of a group of superposed rollers that they can be built about half the size for the same meterage of cardboard.

In troughs with horizontal feed the rollers or groups of rollers at the ends of the trough have been made removable. The introduction of the webs is then effected by laying them by hand alternately around a front and rear roller to obtain the zig-zag path of the web. However, as the rollers become thickly coated. with the hot impregnating composition the operator often burns his hands when introducing the cardboard webs. The introduction also demands a relatively long time. This is particularly objectionable because it is necessary to lift out the group of rollers and replace the web every time the cardboard web tears. Furthermore, when using mordant liquids, the placing of the webs around the rollers is dangerous and wastes time.

These objections are overcome by the present invention. According thereto only ope group of rollers is equipped with a device for raising and lowering, whereas the second group of rollers slides on a carriage guided on the edge of the trough. At the same time the second row of rollers is pushed through the first row of rollers and connected therewith at the end of the feed. The two groups of rollers can then be lifted out of the trough together. As, however, the second group of rollers is in front of the first group of rollers the paper web is merely pulled vertically between the two groups of rollers, this only taking a few minutes. Thereupon the two groups of rollers are lowered into the trough and the second group of rollers returned into its operative position. Then the paper web will be in a zig-zag path over the rollers.

It is known in connection with asphalt sheet troughs with vertical feed of the cardboard web to singly lift the rollers of the lower group. This is a very expensive construction because separate lifting tackle is necessary for every roller. Furthermore the lifting out has already been effected so that for introducing the cardboard web 55 the lower group of rollers is then above the upper group of rollers. As, however, this upper group of rollers is still in the impregnating liquid, the clearance between the rollers is only slight and the passing through of the web in horizontal direction is diificult.

An embodiment of the invention is illustrated by way of example in the accompanying drawing in which:

Fig. 1 shows a longitudinal section through the dipping trough with the rows of rollers in opera- 10 tive Position,

Fig. 2 is a similar view of the trough with raised inner arrangement and introduced cardboard web,

Fig. 3 is a cross-section of the trough.

The impregnating trough has two rows of rollers or cylinders arranged one row above the other. One row of rollers l is mounted on a vertically shiftable slide or support 0 which runs in guide rails and is equipped with a rack d which a, is raised and lowered by a pinion e. a

The rollers of the row 2 are fixed on arms a of a support 9 which is connected with a carriage h. The carriage runs in a guide It extending over almost the entire length of the trough. A pinion m meshing with a rack 12. secured to the top of the guide It is journalled in a bracket 0 mounted in the carriage h and may be rotated by means of a hand wheel 1) for displacing the carriage. When the carriage reaches the ends of the guide the arms a engage in recesses b in the slide ,4: so that, from this moment onwards, the second roller frame is connected with the first. If the forward movement continuous, the carriage slides out of its guide 10, whereupon the second row of rollers comes to stand in front of the first row. With the aid of the rack drive the two groups of rollers are now lifted out of the trough mechanically or by hand and brought into the position shown in Fig. 2 for the introduction of the cardboard web. The web can now be introduced very easily, because it need only be passed between the groups of rollers in downward direction. The web is then wrapped for example around the lowermost roller of group 2 and clamped in the winding out cylinders I. The two groups of rollers are now lowered once more into the trough and the group 2 shifted towards the winding out cylinders. During this movement the cardboard web automatically laps the rollers and unwinds from the roll of untreated cardboard. If necessary the cardboard can also be drawn in the opposite direction through the group of rollers.

This trough arrangement also possesses the greatadvantage that the impregnation period can be better adapted than heretofore to the actual conditions, seeing that the group of rollers 2 can be locked in any desired distance from the group of rollers I by means of a stopping pawl q or the like, which may be engaged with the pinion m, so that according to the adjusted position of the group of rollers 2 more or less cardboard is in the trough.

The raising and lowering of the group of rollers may also be effected in a difl'erent manner to that shown. For example the holders for one group of rollers may be oscillatable so that the two groups of rollers can swing together about a common axis.

I claim:

1. A sheet treating apparatus comprising an impregnating trough, a pair of supports, a plurality of spaced rollers mounted in substantially vertical planes on the first and the second support for guiding the sheet in loops through the trough, the rollers of both supports being normally inside the trough, means for moving the first support in a horizontal direction toward and away from the second support, means for coupling said two supports with each other, and means associated with the second support for lifting both supports when coupled to bring said rollers outside the trough.-

2. A sheet treating apparatus comprising an impregnating trough, a pair of supports, a plurality of spaced rollers mounted in substantially vertical planes on the first and the second support for guiding the sheet in loops through the trough, the rollers of both supports being normally inside the trough, means for moving the first support in a horizontal direction toward and away from the second support, a plurality of projecting arms arranged on the first support, said projecting arms carrying the rollers of the first support at their ends and being arranged opposite to the spaces between the rollers of the second support, said projecting arms being adapted to be inserted into said spaces between the rollers of the second support for coupling the two supports with each other and holding the rollers of the first support beyond the rollers of the second support, and means associated with the second support for lifting both supports when coupled 'to bring said rollers outside the trough.

3. A sheet treating apparatus comprising an impregnating trough, a pair of supports, a plurality of spaced rollers mounted in substantially vertical planes on the first and the second support for guiding the sheet in loops through the trough, the rollers of both supports being normally inside the trough, a carriage connected to the first support, horizontal guiding means arranged on the trough, said carriage being in engagement with said horizontal guiding means for moving the first support in a horizontal direction toward and away from the second support, a plurality of projecting arms arranged on the first support, said projecting arms carrying the rollers of the first support at their ends and being arranged opposite to the spaces between'the rollers of the second support, said projecting arms being adapted to be inserted into .said spaces between the rollers of the second support for coupling the two supports with each other and holding the rollers of the first support beyond the rollers 01' the second support, said guiding means being 01' a dimension providing for an engagement with the carriage until the projecting arms are inserted in the spaces between the rollers of the second support, and means associated with the second support for lifting both supports when coupled to bring said rollers outside the trough. I

4. A sheet treating apparatus comprising an impregnating trough, a pair of supports, a plurality of spaced rollers mounted in substantially verticalplanes on the first and the second support for guiding the sheet in loops through the trough, the rollers-o1 both supports being normally inside the trough, means for moving the first support in a horizontal direction toward and away from the second support, means for coupling said two supports with each other, and means associated with the second support for lifting both supports in vertical direction when coupled to bring said rollers outside the trough..

5. A sheet treating apparatus comprising an impregnating trough, a pair of supports, a plurality of spaced rollers mounted in substantially vertical planes on the first and the second support for guiding the sheet in loops through the trough, the rollers of both supports being normally inside the trough, a carriage connected to the first support, horizontal guiding means arranged on the trough, said carriage being in engagement with said horizontal guiding means for moving the first support in a horizontal direction toward and away from the second support, a plurality of projecting arms arranged on the first support, said projecting arms carrying the rollers of the first support at their ends and being arranged opposite to the spaces between the rollers of the second support, said projecting arms being adapted to be inserted into said spaces between the rollers-of the second support for coupling the two supports with each other and holding the rollers of the first support beyond the rollers of the second support, said guiding means being of a dimension providing for an engagement with the carriage until the projecting arms are inserted in the spaces between the rollers of the second support, vertical guiding means arranged on the trough, said second support being in slidable engagement with said vertical guiding means, and means associated with the second support for lifting both supports when coupled to bring said rollers outside the trough.

6. A sheet treating apparatus comprising an impregnating trough, a pair of supports, a pinrality of spaced rollers mounted in substantially vertical planes on the first and the second sup-- port for guiding the sheet in loops through the trough, the rollers of both supports being normally inside the trough, means for moving the first support in a horizontal direction toward and away from the second support, stopping means associated with said first support for locking same in any adjusted distance from said second support, means for coupling said two supports with each other, and means associated with the second support for lifting both supports when coupled to bring said rollers outside the trough.

O'I'I'O KINNE. 

